OSCARonDebian: Contributions from the Google Summer of Code 2005 - PowerPoint PPT Presentation

OSCARonDebian: Contributions from the Google Summer of Code 2005 program Ram Kumar DANGETTI Institut National des Telecommunications Geoffroy VALLEE Oak Ridge National Laboratory

Introduction ● SoC 2005 allows us to have a pretty good OoD version ● But – trunk has changed a lot and OoD is based on OSCAR 4.0 – difficult to follow OSCAR developments based on RPMs ● So the SoC effort cannot be directly integrated into OSCAR, but gave us a good idea of tasks to do May 15th, 2006 OSCAR'06 Symposium

OoD Issues ● Port to Debian, what are the issues? – different binary package format – different tools to manage these packages – notion of package repository – packages/services/file location are different ● What OSCAR parts have to be modified? – management of binary packages – prereqs – all Debian packages May 15th, 2006 OSCAR'06 Symposium

Binary Package Management ● What's different from an RPM Linux distribution? – notion of online repository (based on apt ): installation of a very basic system + online repository – different set of tools, difficult to match them to RPM tools: dpkg, dselect, apt – automatic management of dependencies – Debian users most of the time do not have the full CD set (14 CDs) May 15th, 2006 OSCAR'06 Symposium

Binary Package Management (2) ● What are our solutions? – extend packman/depman in order to be able to use apt ● transparent solution, extending Packman ● PM_Detect framework (abstraction on top of Packman/Depman) ● possible to use an online repository for the creation of an image – add mechanisms to set up a local repository for Debian packages for OPKG ● Sanity_Check framework ● PM_Detect framework May 15th, 2006 OSCAR'06 Symposium

Binary Package Management (3) Image Deployment System Imager / System Configurator / Configuration System Installer SIS w/ Debian abstraction System Installer Bootstrap Tool Deboot Dependencies apt update-rpms / yume Management Binary Package dpkg rpm Management .deb files RPM files Binary Packages Debian Based Systems RPM Based Systems May 15th, 2006 OSCAR'06 Symposium

Binary Package Management (4) ● For OSCAR packages – use of existing OSCAR packages ● official Debian packages ● from the DCC project ( e.g. Torque) – creation of Debian packages – audit/update post/pre-installation scripts May 15th, 2006 OSCAR'06 Symposium

Prereqs ● Problem – based on RPMs: creation of Debian packages – scripts based on rpm commands and RPMs based Linux distribution ● Solution – creation of an abstraction layer (integrated into the PM_Detect framework) – similar to generic-script – ease the port to new Linux distributions May 15th, 2006 OSCAR'06 Symposium

OSCAR Packages ● OSCAR Packages has been ported to Debian – using official Debian packages – or creating new Debian packages ● Version different from the OSCAR trunk ● Maybe reused in the current effort ● Time consuming – focus on the core integration into trunk, no on OSCAR packages May 15th, 2006 OSCAR'06 Symposium

OoD – Current Efforts ● Current developments based on the OSCAR trunk – direct integration – needs less contributors ● Current issues – lack of documentation (even if it is not any more so true) – lack of man power: focus only on the core May 15th, 2006 OSCAR'06 Symposium

OoD – Current Efforts (2) ● Good points – Erich did a great job with Rapt ● yume-like interface ● will ease the SIS port to Debian – Erich did a great job with prereqs ● generic management, ease the port to Debian – the documentation (for developers) get better and better ● Trac Wiki May 15th, 2006 OSCAR'06 Symposium

Rapt Image Deployment System Imager / System Configurator / Configuration SIS System Installer System Installer w/ Yume abstraction w/ Rapt abstraction Bootstrap Tool Rapt update-rpms / yume Dependencies apt / Deboot Management Binary Package dpkg rpm Management .deb files RPM files Binary Packages Debian Based Systems RPM Based Systems May 15th, 2006 OSCAR'06 Symposium

SoC 2005 - Summary SoC 2005 OSCAR trunk Prereqs PM framework generic-script Package rapt / smart- PM framework management packman OSCAR Not planed / Debian port packages recycle Sanit_check Sanity check ? framework ● What did we learn? – we can do it... but not that way! – not enough man power to not work using trunk – port of OSCAR package is time consuming May 15th, 2006 OSCAR'06 Symposium